Question: When did Oulu begin serving as the head of government for Ilmo Paananen?
Paraphrase: Which year did Oulu begin serving as the head of government for Ilmo Paananen?
SPARQL (Wikidata): SELECT ?value WHERE { wd:Q47048 p:P6 ?s . ?s ps:P6 wd:Q6031942 . ?s pq:P580 ?value}